In this mini-lecture we consider: (i) the abstract number two as described by Peano; (ii) our original question from mini-lecture one, ‘What is 2 + 2 = 4?,’ in the context of Peano’s rules; and (iii) inventing new methods using computers to add numbers and to do much much more.

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This clip is part of a larger course exploring numbers, in particular the counting numbers and their abstract nature: https://massolit.io/courses/what-are-...

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MASSOLIT works with university academics to produce short video lectures in the arts, sciences, humanities and social sciences. It is available to schools and colleges on an institutional license as well as via private subscription: https://www.massolit.io/?source=yt